A replacement 'head' (the part that clips onto the valve) for my old Specialized Airforce trackpump. The original part had broken after about 15 years hard use. It is a very good pump so I didn't want to scrap it, but I could not find anyone selling the correct part. I spotted a generic one on
eBay for a couple of pounds and thought it was worth a punt.
It turns out that the inside of the Specialized hose fits the new head, but the external diameter is too big to get the hose into the head's plastic screw collar. I have managed to get the old collar halfway on. It is a bit of a bodge but the pump
does work. I let my tyres down and pumped them up again. All seems ok.
If necessary, at some later date I will buy a small jubilee clip to hold the hose firmly in place.